Here's a fun way to review those colors. Provide each player with a playdough mat. Have the children roll 10 small playdough balls and set them next to their mat. Show a card to the players, if they tell you the color of the pumpkin then, they can place a playdough ball on the matching pumpkin located on their mat and smash it. If they can't tell you the color, put the card back into the pile.